Bolster for car-trucks



(No Model.)

H. LORIING.

BOLSTER-FOR GAR TRUCKS.

No. 392,739. ,Patented Nov. 1s, 1888.

@3 FIGA.

FIG.3.

Messes.

N. PETERS. Pimurmmgmhar. wnshingw". D. c.

NITED STATES r nieren.

HARRISON LORING, OF BOSTON, MASSACHUSETTS.

BOLSTER FOR CARVFRUCKS.

SPECIFICATION forming part of Letters Patent No. 392,739, dated November13, IESS.

Application filed February 1, 188B. Serial No. 262,620. (No model.)

To @ZZ whom, it may conceive.-

Be it known that I, Hnnnrson Loraine, of Boston, county of Suffolk, andState of Massachusetts, have invented an Improvement in Bolsters forGar-Trucks,of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention relates to metallic bolsters employed in the constructionof car-trucks, substantially such as shown and described in uUnitedStates Patents Nos. 361, S45 and 361, 846, dated April 26, 1887.

The bolsters shown and described in the patents referred to are made ofsheet-steel, preferably about thrce-eighths of an inch inthickness,which is bentinto substantially n shape.

Bractical experience has demonstrated that a bolster composed ofsheet-steel of substantially the thickness referred to and strengthenedby angle-irons of substantially the same shape as the bolster is notsufficiently strong to sustain an excessive load. This defect might bcovercome by increasing the thickness of the sheet-steel from which thebolster is made; but this would add materially to the cost of thebolster and therefore to the car-truck of which it forms a part.

It is the object of this invention to materially strengthen thebolster,so that it may sustain a very heavy load,without materiallyincreasing` the cost of the same.

I accomplish my object by iirst bending inwardly the substantiallyvertical sides of the n-shaped bolster, so that the said inwardlybentportions lie substantially parallel with the top of the bolster, andwith the bolster so bent I employ two or more rigid or unyieldingbraces, each provided, preferably,with lips to engage the inturned edgesof the bolster, as will be hereinafter described.

My invention therefore consists, essentially, in a metallic bolsterhaving its sides provided with inturned iianges combined with internalrigid braces connected thereto and supporting the said bolster,substantially as will be described.

Other features of my invention will be pointed out in the claims at theend of this specification.

Figure l is a side elevation of a bolster embodying my invention; Fig.2, an under side View ofthe bolster shown in Fig. l; Fig. 3, a side viewof a portion of the bolster shown in Fig. l, on an enlarged scale; andFig. 4, an enlarged sectional view of the bolster on line w m, Fig. 1.

v The bolster a, of sheet metal, preferably steel, has its sides a a2for a portion of their width bent inwardly toward the center of thebolster to form flanges b Z. Each iiangebb near the ends of the bolsteris reduced or made smaller, as at b2, (see Fig. 2,) to enable thebolster to be .properly supported upon the bolster-sustaining springs ofthe car-truck shown in the patents referred to.

The bolster c, as shown in Fig. d, is substantially oblong incross-section, and it is strengthcned in accordance with my invention bysubstantially oblong unyielding braces c, preferably two or more, oneach side ofthe bolstercenter. Each oblong brace cis composed,preferably, of malleable cast metal iianged at its outer edges or madeangular, and each brace has lips, as c3, against which abut the inturnedflanged edges b Z) of the bolster. The braces are preferably left openat their centers for lightness. The lips referred to are originallycast, as shown, at the right of Fig. 4; but when the iianged edges b bare in place the said lips are bent up,as at the left of Fig. 4, to thusaid in holding the flanges firmly in place. These angle-braces areriveted in place within the bent bolster-shell by rivets, as at c".

A bolster constructed as above described is enabled to sustain a veryheavy load without buckling or otherwise being injured.

The cost of my improved bolster is not materially greater than that ofthe bolster shown in the patents referred to; but in my bolster Iestimate that cach additional pound of metal added enables the bolsterto support about one ton additional load or weight. I prefer to employthe lips c on the brace; but, if desired, the same may be omitted andthe inturned flanges b b be riveted to the said flanges of the braces.

I claiml. A metallic bolster having its sides provided with inturnedflanges, as b b, combined with internal rigid braces connected theretoand supporting the said bolster, substantially as described.

2. A. metallic bolster having its sides pro- IOO In testimony whereof Ihave signed my nme Io to this specification in the presence of twosubscribing witnesses.

vided with inturned flanges, combined with y rigid braces having lips tohold the edges of the flanges, substantially as described.

3. A metallic bolster having its sides provided with inturned flanges,combined with rigid angle-braces extending entirely across HARRI'SONLORING.

the bolster from side to side near both upper l Witnesses: and lowersides of the bolster, substantially as G. W. GREGORY, described. l J. C.SEARS.

